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List of Rails Model Types
...ting a migration etc car:references comes in very handy for creating a car_id foreign key.
– BKSpurgeon
Jul 25 '16 at 22:46
1
...
Fill SVG path element with a background-image
... do it by making the background into a pattern:
<defs>
<pattern id="img1" patternUnits="userSpaceOnUse" width="100" height="100">
<image href="wall.jpg" x="0" y="0" width="100" height="100" />
</pattern>
</defs>
Adjust the width and height according to your ima...
Asynchronous vs synchronous execution, what does it really mean? [closed]
...iveMQ, WebSphere MQ, HornetQ, MSMQ, etc.). In this case, the asynchronous call doesn't involve multithread programming or handling concurrency at the OS level.
– Paulo Merson
Jun 15 '15 at 12:07
...
Close Window from ViewModel
...define an x:Name for the window which should be close. In my XAML Window i call this method via Command and pass the window itself as a parameter to the ViewModel using CommandParameter.
Command="{Binding CloseWindowCommand, Mode=OneWay}"
CommandParameter="{Binding ElementName=TestWindow}"
ViewM...
How can i query for null values in entity framework?
... microsoft... really?!?!? In version 4.1?!?! +1
– David
Aug 1 '11 at 18:00
1
That Linq-To-SQL wor...
Saving an Object (Data persistence)
...ng this is no longer necessary since the pickle module now does it automatically—see What difference between pickle and _pickle in python 3?.
The rundown is you could use something like the following to ensure that your code will always use the C version when it's available in both Python 2 and 3...
What's the rationale for null terminated strings?
...write primitives are implemented
at a very low level. They are not library calls, but system calls. And the same API is used
for binary or text files. File reading primitives get a buffer address and a size and return
the new size. And you can use strings as the buffer to write. Using another kind o...
Why use jQuery on() instead of click()
...
Because you might have a dynamically generated elements (for example coming from an AJAX call), you might want to have the same click handler that was previously bound to the same element selector, you then "delegate" the click event using on() with select...
What is a lambda (function)?
...lt = pred(4) // true
Ruby
Ruby is slightly different in that you cannot call a lambda using the exact same syntax as calling a function, but it still has lambdas.
def adder(x)
lambda { |y| x + y }
end
add5 = adder(5)
add5[1] == 6
Ruby being Ruby, there is a shorthand for lambdas, so you can ...
Python nonlocal statement
...e beauty of higher order functions. Also in functional programming this is called composition, python is not a pure FP language but you can certainly play with a features (generators, higher order functions are some examples)
– superuseroi
Mar 30 '15 at 21:24
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